Click New

Click the Add an action button

Search for: Change variable value or scroll down to change variable value

Click the Choose a variable

Click the Create global variable

Click this text field

Click this group

Click the Object selection

Click the Choose a variable

Click the selectedCharacter

Click this icon for binding

Bind it to the item data

Click the Close

Click the Add an action

Search for: Navigate to or scroll down to Navigate to

Click this group

Click your dynamic collection page

Click close